GB9930556D0 - Improvements in vacuum pumps - Google Patents
Improvements in vacuum pumpsInfo
- Publication number
- GB9930556D0 GB9930556D0 GBGB9930556.7A GB9930556A GB9930556D0 GB 9930556 D0 GB9930556 D0 GB 9930556D0 GB 9930556 A GB9930556 A GB 9930556A GB 9930556 D0 GB9930556 D0 GB 9930556D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- vacuum pumps
- pumps
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
- F04C2220/12—Dry running
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
- F04C2250/201—Geometry of the rotor conical shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9930556.7A GB9930556D0 (en) | 1999-12-23 | 1999-12-23 | Improvements in vacuum pumps |
EP00311163A EP1111243A3 (en) | 1999-12-23 | 2000-12-14 | Screw vacuum pump |
US09/740,085 US6672855B2 (en) | 1999-12-23 | 2000-12-19 | Vacuum pumps |
JP2000404616A JP2002031071A (en) | 1999-12-23 | 2000-12-25 | Vacuum pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9930556.7A GB9930556D0 (en) | 1999-12-23 | 1999-12-23 | Improvements in vacuum pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
GB9930556D0 true GB9930556D0 (en) | 2000-02-16 |
Family
ID=10866978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB9930556.7A Ceased GB9930556D0 (en) | 1999-12-23 | 1999-12-23 | Improvements in vacuum pumps |
Country Status (4)
Country | Link |
---|---|
US (1) | US6672855B2 (en) |
EP (1) | EP1111243A3 (en) |
JP (1) | JP2002031071A (en) |
GB (1) | GB9930556D0 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10102341A1 (en) * | 2001-01-19 | 2002-08-08 | Ralf Steffens | Profile contour of a screw pump |
JP2004263629A (en) * | 2003-03-03 | 2004-09-24 | Tadahiro Omi | Screw vacuum pump |
ATE508280T1 (en) * | 2004-03-05 | 2011-05-15 | Sterling Ind Consult Gmbh | DRY DISPLACEMENT VACUUM PUMP WITH INTERNAL COMPRESSION |
EP1859163A4 (en) * | 2005-03-10 | 2014-11-26 | Alan Notis | Pressure sealed tapered screw pump/motor |
US20070020115A1 (en) * | 2005-07-01 | 2007-01-25 | The Boc Group, Inc. | Integrated pump apparatus for semiconductor processing |
US20070081893A1 (en) * | 2005-10-06 | 2007-04-12 | The Boc Group, Inc. | Pump apparatus for semiconductor processing |
GB0525378D0 (en) | 2005-12-13 | 2006-01-18 | Boc Group Plc | Screw Pump |
US20070248454A1 (en) * | 2006-04-19 | 2007-10-25 | Davis Walter D | Device for changing the pressure of a fluid |
US8328542B2 (en) * | 2008-12-31 | 2012-12-11 | General Electric Company | Positive displacement rotary components having main and gate rotors with axial flow inlets and outlets |
DE102010019402A1 (en) * | 2010-05-04 | 2011-11-10 | Oerlikon Leybold Vacuum Gmbh | Screw vacuum pump |
US10006340B2 (en) * | 2013-10-16 | 2018-06-26 | John Malcolm Gray | Supercharger |
WO2017075555A1 (en) * | 2015-10-30 | 2017-05-04 | Gardner Denver, Inc. | Complex screw rotors |
CN105971877B (en) * | 2016-07-11 | 2017-11-14 | 中国石油大学(华东) | A kind of conical screw rotor and its Twin-screw vacuum pump |
DE202017005336U1 (en) * | 2017-10-17 | 2019-01-21 | Leybold Gmbh | screw rotor |
DE202018000178U1 (en) * | 2018-01-12 | 2019-04-15 | Leybold Gmbh | compressor |
JP2022069105A (en) * | 2020-10-23 | 2022-05-11 | 株式会社日立産機システム | Screw compressor and screw rotor |
CN114562457A (en) * | 2022-04-11 | 2022-05-31 | 浙江创为真空设备股份有限公司 | Equal-pitch variable-compression screw rotor |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1164546A (en) * | 1913-04-29 | 1915-12-14 | Alfons H Neuland | Displacement apparatus. |
GB419338A (en) * | 1933-01-03 | 1934-11-09 | British Thomson Houston Co Ltd | Improvements in and relating to screw pumps or compressors |
FR789211A (en) * | 1935-04-24 | 1935-10-25 | Cfcmug | Rotary positive displacement motor or compressor |
CH244903A (en) * | 1944-03-29 | 1946-10-15 | Lavorazione Mat Plast | Screw press for mixing and extrusion of synthetic plastic materials. |
NL282778A (en) * | 1960-12-15 | |||
GB2165890B (en) * | 1984-10-24 | 1988-08-17 | Stothert & Pitt Plc | Improvements in pumps |
US4792294A (en) * | 1986-04-11 | 1988-12-20 | Mowli John C | Two-stage screw auger pumping apparatus |
KR0133154B1 (en) * | 1994-08-22 | 1998-04-20 | 이종대 | Screw pump |
DE19728434C2 (en) * | 1997-07-03 | 1999-07-29 | Busch Sa Atel | Screw compressors for compressible media |
DE19736017A1 (en) * | 1997-08-20 | 1999-02-25 | Peter Frieden | Vacuum pump or compressor for compacting gases |
DE19745615A1 (en) * | 1997-10-10 | 1999-04-15 | Leybold Vakuum Gmbh | Screw vacuum pump with rotors |
DE19800825A1 (en) * | 1998-01-02 | 1999-07-08 | Schacht Friedrich | Dry compacting screw pump |
DE19800711A1 (en) * | 1998-01-10 | 1999-07-29 | Hermann Dipl Ing Lang | Mostly dry working screw spindle vacuum pump |
JP3086217B1 (en) * | 1999-05-07 | 2000-09-11 | 財団法人工業技術研究院 | Dual screw rotor device |
US6129534A (en) * | 1999-06-16 | 2000-10-10 | The Boc Group Plc | Vacuum pumps |
TW501675U (en) * | 2000-02-02 | 2002-09-01 | Ind Tech Res Inst | Dual spiral rotor mechanism with electrically controlled gap adjustment |
-
1999
- 1999-12-23 GB GBGB9930556.7A patent/GB9930556D0/en not_active Ceased
-
2000
- 2000-12-14 EP EP00311163A patent/EP1111243A3/en not_active Withdrawn
- 2000-12-19 US US09/740,085 patent/US6672855B2/en not_active Expired - Lifetime
- 2000-12-25 JP JP2000404616A patent/JP2002031071A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2002031071A (en) | 2002-01-31 |
EP1111243A3 (en) | 2002-05-08 |
US20010024620A1 (en) | 2001-09-27 |
EP1111243A2 (en) | 2001-06-27 |
US6672855B2 (en) | 2004-01-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AT | Applications terminated before publication under section 16(1) |